i am trying to make an actionListener on a button in another button which has also an actionlistener and i just couldn't figure it out for some way. I am trying to make an action on the 2nd button but i couldn't figure it out.If anyone helps me i'd appreciate! here is the code below:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.*;
public class basic implements ActionListener{
public static void main(String[] args) {
basic process = new basic ();
}
public basic(){
JFrame fan = new JFrame("Scheme");
JPanel one = new JPanel(new BorderLayout());
fan.add(one);
JPanel uno = new JPanel();
uno.setLayout(new BoxLayout(uno, BoxLayout.Y_AXIS));
JButton addB = new JButton("first choice");
addB.setAlignmentX(Component.CENTER_ALIGNMENT);
uno.add(addB);
addDButton.setActionCommand("hehe");
addDButton.addActionListener(this);
one.add(uno,BorderLayout.CENTER);
fan.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
fan.setSize(500,700);
fan.setLocationByPlatform(true);
fan.setVisible(true);
}
public void actionPerformed(ActionEvent evt) {
JPanel markP = new JPanel(new FlowLayout(FlowLayout.RIGHT,10,20));
JDialog dialog = new JDialog((JFrame)null);
dialog.getContentPane().add(markP,BorderLayout.CENTER);
if (evt.getActionCommand().equals("hehe")) {
JLabel title = new JLabel("Proceed");
title.setFont(new Font("Arial",Font.BOLD,15));
markP.add(title,BorderLayout.NORTH);
JButton exit = new JButton("Exit");
markP.add(exit);
//here i want to create another actionListener on the exit button only without affecting the other content which is in the button "addB " so that when i click on the addB button the J dialog pops up, and than when i click on exit button the program will return to the menu.I couldn't figure it out.
dialog.toFront();
dialog.setModal(true);
dialog.pack(); //
dialog.setLocationRelativeTo(null); //
dialog.setVisible(true);
}
// here the code goes on but the problem is that of the actionListener which is concerned.
JButton exit = new JButton("Exit");
exit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
// you code here
}
});
You should use better variables names. It is not easy to follow your code
You could use the same ActionListener if you check the source of the action using
if (evt.getSource().equals(addDButton) { original code }
else { code for the other button }
Related
Here is my code, but the error shows that the implemented ActionListener is not correct. I also declared the buttons so how do I make the system exit? What did I do wrong? Thanks in advance
import javax.swing.*;
import java.awt.*;
import java.awt.FlowLayout;
public class MyFrame extends JFrame implements ActionListener {
public MyFrame() {
// set flow layout for the frame
this.getContentPane().setLayout(new FlowLayout());
JButton ExitBtn = new JButton();
ExitBtn.setText("Exit");
JButton Find = new JButton("Find");
JButton Clear = new JButton("Clear");
// add buttons to frame
add(ExitBtn);
add(Find);
add(Clear);
}
public void actionPerformed(ActionEvent e){
System.exit(0);
ExitBtn.addActionListener(this);
}
public static void main(String[] args) {
MyFrame mf = new MyFrame();
mf.pack();
mf.setVisible(true);
mf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
onClick:
frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
I think you should move the ExitBtn.addActionListener(this) call to the constructor of MyFrame class so that it looks like this:
JButton ExitBtn = new JButton();
ExitBtn.setText("Exit");
ExitBtn.addActionListener(this)
and actionPermormed method looks like this:
#Override
public void actionPerformed(ActionEvent e){
System.exit(0);
}
I have my JButton set up and everything but it does absolutely nothing. Could someone tell me how to add a command such as system.out.println or some Scanner commands to a JButton?
Here is my line of code. It is very simple and I'm just testing JButton to add it to some of my other programs
import javax.swing.*;
public class Swing extends JFrame {
JButton load = new JButton("Load");
JButton save = new JButton("Save");
JButton unsubscribe = new JButton("Unsubscribe");
public ButtonFrame() {
super ("ButtonFrame");
setSize(140, 170);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel pane = new JPanel();
pane.add(load);
pane.add(save);
pane.add(unsubscribe);
add(pane);
setVisible(true);
}
public static void main(String[] arguments) {
ButtonFrame bf = new ButtonFrame();
}
}
See How to Write an Action Listener.
I suggest you read the entire tutorial (or keep a link to it for reference) as it contains all the Swing basics.
Hope this helps
load.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//Here goes the action (method) you want to execute when clicked
System.out.println("You clicked the button load");
}
});
//The same for save button
save.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//Here goes the action (method) you want to execute when clicked
System.out.println("You clicked the button save");
}
});
Hello I am writing a sort of Menu for an encryption program I am writing. I finished the core of it, and now i want to try to create a GUI for it. Here is the code for the first Menu:
package matrix_with_GUI;
import javax.swing.*;
import java.awt.event.* ;
import java.awt.* ;
public class Main_Menu extends JFrame implements ActionListener{
private JButton action1 = new JButton ("");
private JButton action2 = new JButton ("");
private JPanel pane = new JPanel();
private JLabel lbl;
public static void main(String[] args) {
Main_Menu main = new Main_Menu();
}
public Main_Menu(){
super();
JPanel pane=new JPanel();
setTitle ("Start Menu") ;
JFrame frame = new JFrame("");
setVisible(true);
setSize (380, 260) ;
setLocation (450, 200) ;
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE) ;
action1 = new JButton("Start");
action2 = new JButton("Exit");
lbl = new JLabel ("Welcome to the Matrix Encoder/Decoder!!!");
setLayout(new FlowLayout());
add (lbl) ;
add(action1, BorderLayout.CENTER);
action1.addActionListener (this);
add(action2, BorderLayout.CENTER);
action2.addActionListener (this);
}
#Override
public void actionPerformed(ActionEvent event) {
// TODO Auto-generated method stub
OptionsMenu x = new OptionsMenu();
if (event.getSource() == action1)
{
System.exit(0);
x.OptionsMenu();
}
else if(event.getSource() == action2){
System.exit(0);
}
}
}
When the Start Button is clicked, the new menu comes up all fine and good, but the first menu stays open. Is there a way to close this first menu AND open the second menu with the first button click? I'm very new to GUI so the simplest solution would be very helpful. On a side note is there a simple way to move the Start button to the next line? Thanks
You have 2 options: you can use a Window Listener, or you can use the dispose() method. To do the dispose() just type
* This is better to be used with subframes and 2nd level windows.*
this.dispose();
or check this link for using the window listener
Closing JFrame
In order to close the Main_Menu, you can just call its dispose method:
this.dispose();
instead of calling System.exit(0), which will terminate the JVM altogether.
Ok, i started learning java, and this is a code from internet that doesn't work on my pc
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class form2
{
public static void main(String args[])
{
// Create Frame 1
JFrame frame = new JFrame("Frame 1");
frame.setSize(333,333);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create panel
JPanel panel = new JPanel();
// Create button
JButton button = new JButton("Press me!");
// Add things
panel.add(button);
frame.add(panel);
frame.setVisible(true);
// Add the action listener to that button
button.addActionListener(new action());
static class action implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
// Create Frame 2
JFrame frame2 = new JFrame("Frame 2");
frame2.setSize(200,200);
frame2.setVisible(true);
frame2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel label = new JLabel("Clicked!");
JPanel panel2 = new JPanel();
// First add to frame2 the panel just create
frame2.add(panel2);
// Add to panel the label
panel2.add(label);
}
}
}
}
And it give me an error about action and i don't understand why.
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
action cannot be resolved to a type
Illegal modifier for the local class action; only abstract or final is permitted
at form2.main(form2.java:26)
What is my problem?? On that guy's computer works
http://www.youtube.com/watch?v=jEXxaPQ_fQo&feature=channel_video_title
Can anyone help me??
You are declaring a static class inside of a method which you shouldn't do. So take it out of the method, or better, make it an anonymous inner class:
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// Create Frame 2
JFrame frame2 = new JFrame("Frame 2");
frame2.setSize(200, 200);
frame2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel label = new JLabel("Clicked!");
JPanel panel2 = new JPanel();
// First add to frame2 the panel just create
frame2.add(panel2);
// Add to panel the label
panel2.add(label);
frame2.setVisible(true);
}
});
What does this question have to do with java-ee by the way??
You declare a class inside a method, in this case main, however, it should be outside of it, like the guy in the video says.
Hope that helps!
Static classes cannot be defined inside a method. Move the class definition static class .... { } outside of your main method. Also, it is good practice to start classes with an uppercase character (e.g AddPanelAction).
The actionlistener class must be declared outside of the main method like this:
import javax.swing.*;
import java.awt.event.*;
public class Main
{
public static void main(String args[])
{
// Create Frame 1
JFrame frame = new JFrame("Frame 1");
frame.setSize(333,333);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create panel
JPanel panel = new JPanel();
// Create button
JButton button = new JButton("Press me!");
// Add things
panel.add(button);
frame.add(panel);
frame.setVisible(true);
// Add the action listener to that button
button.addActionListener(new action());
}
public static class action implements ActionListener {
public void actionPerformed(ActionEvent e) {
// Create Frame 2
JFrame frame2 = new JFrame("Frame 2");
frame2.setSize(200,200);
frame2.setVisible(true);
frame2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel label = new JLabel("Clicked!");
JPanel panel2 = new JPanel();
// First add to frame2 the panel just create
frame2.add(panel2);
// Add to panel the label
panel2.add(label);
}
}
}
Or you can declare the actionlistener by using an anonymous inner class like this:
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// Do things here
}
});
Static classes can not be defined inside a method. Move that class outside the main method or declare your class non-static within the main method itself, if you need . A static class always requires one outer non-static class.
A day late and dollar short.... but I'll still add it.
Most of the Java actionListener examples on the web are too darn complex. To understand it, you just really need a form, button, and the actionListener. In the example below, the form server as the listener through the addition of 'implements ActionListener'.
import java.applet.Applet;
import java.awt.Button;
import java.awt.Toolkit;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class Sample extends Applet implements ActionListener {
Button button;
public void init() {
setLayout(new BorderLayout());
button = new Button("Test");
add("Center", button);
button.addActionListener(this);
}
public void actionPerformed(ActionEvent e) {
// your code to do what you want when the button was clicked goes here
}
}
I'm creating a Java GUI using Swing with Eclipse and Window Builder Pro. I'm using JButtons and JToggleButtons. I want to change toggle button's state from another button.
For example, when I click the clear grid, all the toggle buttons will be 'not selected'.
How can I do this? What are the methods that I have to use for toggle buttons and buttons?
toggleButton.setSelected(boolean b)
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.AbstractButton;
import javax.swing.JFrame;
import javax.swing.JToggleButton;
public class JToggleButtonAction {
public static void main(String args[]) {
JFrame frame = new JFrame("Selecting Toggle");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JToggleButton toggleButton = new JToggleButton("Toggle Button");
final JToggleButton toggleButton1 = new JToggleButton("Another Toggle Button");
ActionListener actionListener = new ActionListener() {
#Override
public void actionPerformed(ActionEvent actionEvent) {
AbstractButton abstractButton = (AbstractButton) actionEvent.getSource();
boolean selected = abstractButton.getModel().isSelected();
System.out.println("Action - selected=" + selected + "\n");
toggleButton1.setSelected(selected);
}
};
toggleButton.addActionListener(actionListener);
frame.add(toggleButton, BorderLayout.NORTH);
frame.add(toggleButton1, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
}
Add actionListener to your JButton and in actionPerformed(ActionEvent) method change the state of all JToggleButtons. Make sure all your JToggleButton is accessible in this method. A simple example will be..
JFrame frame = new JFrame("Panel image demo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(400, 400);
frame.setLayout(new FlowLayout());
final JToggleButton[] button = new JToggleButton[10];
for (int i = 0; i < button.length; i++) {
button[i] = new JToggleButton("Toggle Us");
frame.add(button[i]);
}
JButton jButton = new JButton("Toggle that button");
jButton.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
for (JToggleButton jToggleButton : button) {
jToggleButton.setSelected(!jToggleButton.isSelected()); // <-- this will change the state of toggle button
}
}
});
frame.add(jButton);
frame.setVisible(true);
Register an ActionListener to the JButton instance and make sure you can access the toggle buttons therein to manipulate their state.
i was looking for this, this might help somebody out
B1.setSelected(false);
i made a method that make all my button false (unselect the toggles when i wanted it)